Full-disc solar images obtained with the Extreme Ultraviolet Imaging
Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO) were
used to analyse solar differential rotation determined by tracing
coronal bright points. Two different procedures
were developed and compared: an interactive and an automatic
method. The interactive method is based on the visual tracing of
coronal bright points in consecutive images
using computer programs written in the Interactive Data
Language (IDL). The automatic method relies on the IDL procedure "Regions
Of Interest (ROI) segmentation" which is used to detect and follow bright
points in
triplets of consecutive images. The test-results obtained applying
both methods by different persons who performed tracing are
presented and compared. The advantages and disadvantages of the two methods
are discussed.

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